Corner unit



Patented Qct. 9, 1945 i UNITED STATES PATENT OFFICE CORNER UNIT James H. Norrid, Detroit, Mich. Application February 6, 1943, Serial No. 474,911

2 Claims.

reference to the following description and the accompanying drawing in which Figure 1 is a plan view of the core element.

Figures 2 and 3 are respectively sections'on lines 22 and 3-3.

Figure 4 is an elevation of a completed unit looking at the outside.

Figure 5 is an elevation, from the inside, of a unit and a portion of another showing their interfitting feature.

Figure 6 is a horizontal section of a unit; and

Figure 7 is a section on line 1-1 of Figure 6,

taken at the junction of two units.

Corner units of the type indicated but with a core member of metal are not new, but these are objectionable in several respects.

In the first place, such metal core members must be provided with nail holes and if, in the application of such units, the applier fails to drive the nail in the proper place, disfigurement results.

In the second place, such units are needlessly heavy and therefore cost more for shipping.

Attempts have been made to replace the metal core members with non-metallic material, but materials such as those suitable for building coverings, do not take a permanent set when formed into corners. And, not having a permanent set, they tend to straighten out and thereby fail to fit a corner.

In the present case, this tendency is entirely eliminated by making the core member of two parts of non-metallic material hinged together.

In the specific description, heavy waterproof paper board is stated as the preferred material for the core member but it should be noted that any relatively s'tifi n0nmetal1ic material, such as composition board, Celotex, or the like may be used.

As indicated in the drawing, the unit preferably consists of a core member of two strips of waterproofed paper board hinged together by securing strips 2| of suitable cloth to the faces of the board, the strips passing between the adjacent edges of the boards and being fixed to opposite faces of the boards. Further, alternate strips pass between the boards in opposite directions, as indicated in Figures 2 and 3, so that the hinge so produced shows little or no tendency to separate.

When the boards 20 have been hinged together, a strip 25 of the surfacing composition sheet somewhat wider than the hinged boards is fixed to one face of the boards, and its edges 26 turned over the outeredges and fixed to the under face in the position shown.

For fixing the hinge strips 2| and the sheet 25 to the boards 20, a suitable adhesive may be used, the preferable one being asphalt, tar or the like.

In applying the sheet 25 to the boards 20, it is preferred to so place the sheet thereon as to leave the boards uncovered at one end for a short distance, as at 30, and provide an overhang of the sheet 25 at the other end, as at 3|. This permits the dovetailing together of two units, as indicated in Figure 5, when the corner length to be covered is greater than that of a single unit.

It should be noted that, when sheet 25 is turned around, the outer edge of the board 20, the short radius bend so provided will not always be, and in fact. seldom is a smooth curve at the end not supported inside by the board, that is, at 3|. As a consequence, the insertion of the tongue '30 is troublesome and diflicult unless means is provided to avoid such difficulty. Accordingly, the tongue 30 is shown as having its corners removed. This not only provides for easy entrance of the tongue 30 but also permits a slight lateral adjustment if necessary.

I claim:

1. A corner unit for composition building sheathing consisting of a core member composed of two longitudinally extending strips of relatively stiff non-metallic material and thin fabric securing strips passing between the adjacent edges of the core member strips and secured to the opposite sides thereof and hinging the core member strips together, and a covering of sheathing material secured to the core member strips, the hinged edges of the core member strips being adapted to roll on each other when arranging the strips and the sheathing material at an angle, whereby stretching of the sheathing material is reduced to a minimum.

2. A corner unit for composition building sheathing consisting of a core member composed of two longitudinally extending strips of relativecore member strips, the hinged edges of the core member strips being adapted to roll on each other when arranging the strips and the sheathing material at an angle, whereby stretching of the 5 sheathing material i reduced to a minimum.

JANIES H. NORRID. 

